Trouble with Neu 1521

[jhautz]

Well I'll be damned... The 1521 is different from the 1515 and 1512. I looked at my 1515 and 1512 cuz they were handy, but after seeing lutachs picture I dug my revo out from its winter hibernation and looked at the 1521 that is in it. And it does appear that the 1521 does have a separate front plate. Its not solid one piece like the 1515 and 1512.

[othello]

So the Neu 1521 and 1527 are built differently since the Neu 1512 and 1515 are built with a front bell/can in one piece. Interesting, i wouldn't have expected this.

This is how my 1512 (and 1515) can looks like.


EDIT: jhautz was faster

[rhylsadar]

hi

so we do not really know yet if the 1515 has a screwed backplate?
i have to admit it surprises me that those backplates were just pressed in in some motors.
i hope the frontplates on the those bigger 1520er series are screwed.

bye
rhylsadar

Neu changed the 1521 design, I think, last month. I had one of each. The new Neu uses a one piece front. The end cap is pressed in and held in with 4 roll pins. E-mail Steve Neu and you will get the story.

[othello]

An end bell loosening itself from the can in a surface model like a car is nothing to worry about too much. In a helicopter or plane it could mean a total loss.

My truggy had no acceleration any more and felt like i had brakes engaged. My eagletree logger recorded the following data.

You will notice those big amp spikes at the end of the run and a rise in motor temperature.

This improvement in motor design tells me i'm not the only one experiencing this issue. I wonder if the new design will prevent the end bell to come loose again in "minor" crashes or if i should secure it somehow.

Originally Posted by knotted

Neu changed the 1521 design, I think, last month. I had one of each. The new Neu uses a one piece front. The end cap is pressed in and held in with 4 roll pins. E-mail Steve Neu and you will get the story.

Looks like my Neu is the two piece old design. I emailed Steve yesterday so we'll see what he says. Since it is no big deal I guess I won't worry much, but I would prefer to have the one piece front.

[rhylsadar]

hi

if the frontplate is only pressed in it may be a real problem if you are jumping your truck a lot. the dynamics of the dead weight of the motor itself when landing will make that frontplate pop off quite easily like it happens on the feigaos.

bye
rhylsadar

Originally Posted by rhylsadar

hi

if the frontplate is only pressed in it may be a real problem if you are jumping your truck a lot. the dynamics of the dead weight of the motor itself when landing will make that frontplate pop off quite easily like it happens on the feigaos.

bye
rhylsadar

Good point, and I plan on jumping this truck a lot.

[zeropointbug]

Othello, I now have an explanation as to why FLYDMA.com has had a big sale on all their Neu's, some being HALF price!

They don't seem to have the 'new' ones yet however...

I bashed a little yesterday and again this evening. After each time it was loose. I am concerned.

I am going to see what Mr. Neu would charge to change out my housing for the 1 piece design. Maybe I'll be lucky and he'll do it under warranty. I'm pretty scared to jump this truck the way it is. Bashing is what my savage is about and right now I feel like I'd better be gentle.

[ssspconcepts]

Originally Posted by zeropointbug

Othello, I now have an explanation as to why FLYDMA.com has had a big sale on all their Neu's, some being HALF price!

They don't seem to have the 'new' ones yet however...

Here's some Neu news: http://www.neumotors.com/20061222/News.html

I spoke to someone at Neu. She recommended that I use loctite on it and see if that solves the problem. I am going to give it a try, though I honestly would prefer for this not to be an issue for a motor of this price.... She said if it continues to be a problem I can send it in to be fixed.

I'll keep you posted, thanks everyone for the input

[othello]

@zeropointbug
Flydma cleared their stock (as Neu will sell them directly) and at this price i couldn't resist taking a Neu 1515 (last one on their site) which has now replaced my Neu 1512 in my truggy.

@BashOn
I felt like you did when i first saw my endbell sticking out too far from the can. I instantly had pictures in mind of popped of Feigao endbells. Just glue it before it will pop off and you will have to deal with a grinded rotor. At least Neu Motors seem to have solved this issue with their new version.

[lutach]

I used a thick CA in one of my Feigaos and it worked good. I thought it would be too strong, but I just added a small amout in 4 places. In case you need to replace bearings, all you do is heat it to soften up the CA.

I couldn't resist getting a 1107/1.5D from flydma.com. I got it to compare with a Mega ACn16/15/1. Now I need to find an adapter to fit the normal 540 mounting holes.